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Coquimbite

Pictures (13 Images total)

Coquimbit
Views (Image: 1295130096): 2041
Coquimbit

Javier Ortega Mine, Dept. Ayacucho, Peru, 76x40 mm

Collection: Embarak
Copyright: Embarak
Contribution: Embarak 2011-01-15
Locality: Javier Mine (Javier Ortega Mine) / Huac-Huas, Distrikt / Lucanas, Provinz / Ayacucho, Region / Peru
Coquimbit; BB 6,0 mm
Views (Image: 1241196865): 2610
Coquimbit; BB 6,0 mm (SNr: B003894)

Fundort: Dexter Mine No. 7 Mine, Calf Mesa, Emery Co., Utah

Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: eschuhbauer 2009-05-01
Locality: Dexter No.7 Mine / Calf Mesa / San Rafael District / Emery Co. / Utah / USA
Coquimbit
Views (Image: 1108539740): 2461
Coquimbit

mit gelbem Copiapit; Stufengröße: rd. 4 x 2,5 cm; Fundort: Copiapo-Bergbaurevier, III. Region, Chile

Copyright: McSchuerf
Contribution: Mineralienatlas 2005-02-16
Locality: Copiapó, Provinz / Atacama, Region (III. Region) / Chile
Coquimbit
Views (Image: 1295794164): 682
Coquimbit

Bildbreite: 4,5 mm, Fundort: Alcaparrosa Mine, Cerritos Bayos, Calama, Provinz Antofagasta, Chile

Collection: Domenico Preite
Copyright: Enrico Bonacina
Contribution: thdun5 2011-01-23
Locality: Alcaparrosa Mine / Cerritos Bayos / Calama / Antofagasta, Provinz / Antofagasta, Region (II. Region) / Chile
Coquimbit
Views (Image: 1271589555): 1554
Coquimbit

Bildbreite: 0,5 mm, Fundort: Alcaparrosa Mine, Cerritos Bayos, Calama, Provinz Antofagasta, Chile.

Copyright: Luigi Mattei
Contribution: thdun5 2010-04-18
Locality: Alcaparrosa Mine / Cerritos Bayos / Calama / Antofagasta, Provinz / Antofagasta, Region (II. Region) / Chile
Coquimbit
Views (Image: 1257628615): 2329
Coquimbit

Größe: 44x29x28 mm; Fundort: Rio Tinto, Huelva, Andalusien, Spanien

Copyright: Rob Lavinsky
Contribution: slugslayer 2009-11-07
Locality: Minas de Riotinto / Cuenca Minera / Huelva, Provinz / Andalusien (Andalucía) / Spanien

Collectors Summary

Color farblos
Streak color weiß
Hardness (Mohs) 2.5
Solubility +++ langsam in H2O, Lagern bei 40-60% realtiver Luftfeuchte oderin einem versiegelten Behälter. Hohe und tiefe Luftfeuchten zerstörendas Mineral.
Crystal System trigonal, P31c

Chemism

Chem­ical formula

AlFe3(SO4)6(H2O)12·6H2O

Chem­ical com­po­si­tion

Aluminium, Eisen, Sauerstoff, Schwefel, Wasserstoff

Unit weight: 1095.1722902 u; Number of atoms in the formula: 88

Info

Empirical formula:

AlFe3(SO4)6(H2O)12·6H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

3.31

36

40.91

1.0079470

36.2860920

Oxygen

O

61.36

42

47.73

15.9994300

671.9760600

Aluminium

Al

2.46

1

1.14

26.9815382

26.9815382

Sulfur

S

17.57

6

6.82

32.0655000

192.3930000

Iron

Fe

15.30

3

3.41

55.8452000

167.5356000

Anal­y­sis wt%

Fe2O3 : 25.84, Al2O3 : 2.25, SO3 : 44.19, H2O : 27.25 (Ref: Dana, 7th ed. 2)

Strunz 9th edi­tion incl. updates

7.CB.50

7: Sulfate (Selenate, Tellurate, Chromate, Molybdate, Wolframate)
C: Sulfate (Selenate, etc.) ohne weitere Anionen, mit H2O
B: Mit ausschließlich mittelgroßen Kationen
50:Coquimbit-Gruppe

Lapis Clas­sifica­tion

VI/C.08-040

VI: SULFATE, CHROMATE, MOLYBDATE UND WOLFRAMATE
C: Wasserhaltige Sulfate, ohne fremde Anionen
8: Mittelgroße Kationen

Clas­sifica­tion by Hölzel

7.CC.211

7: SULFATES CHROMATES MOLYBDATES WOLFRAMATES
C: Sulfates (-Anions +Water)
C: Alunogen-Group

Dana 8th edi­tion

29.08.03.01

29: Hydrated Acid and Sulfates
08: Hydrated Acid and Sulfates where (A)2 (XO4)3 · x(H2O)

IMA sta­tus

Erstbeschreibung vor CNMNC-Gründung (1959), als Mineral meist anerkannt; IMA 19-F: Redefinition von Coquimbit - CNMNC Newsletter 52, 2019

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

farblos

Streak color

weiß

max. Birefrin­gence

0.009

Birefringence chart\! Coquimbite title=Birefringence chart Coquimbite

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

1.539

RI value γ / ε

1.548

Ri mean

1.542

2V angle

Uniaxial (+)

Crystallography

Crystal Sys­tem

trigonal

Class (H-M)

3m

Space Group number

163

Space Group

P31c

Cell param­e­ters a (Å)

10.922

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

17.084

Cell param­e­ters a/b or c/a

1.564

Cell param­e­ters c/b

-

Z

2

Volumne (ų)

1764.918

X-Ray Pow­der Diffrac­tion

9.43(40),
8.26(100),
5.441(50),
4.599(60),
3.633(50),
3.492(30),
3.360(70),
2.753(70)

XRD chart Coquimbite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

2.5

VHN (Hard­ness Vick­ers)

53 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.11 (gemessen)

2.061 ( ρ calc. Mineralienatlas )

Insta­bil­ity

+++ langsam in H2O, Lagern bei 40-60% realtiver Luftfeuchte oderin einem versiegelten Behälter. Hohe und tiefe Luftfeuchten zerstörendas Mineral.

(Co-)Type locality

(Co-)Type locality

Chile/Coquimbo, Region (IV. Region)

Type mate­r­ial

Das Neotypiematerial ist das von Fang und Robinson (1970) untersuchte Exemplar aus der Tierra Amarilla (der von Rose, 1833, beschriebenen ursprünglichen Typuslokalität) und wird im U.S. National Museum, Washington DC, USA, Katalognummer 12548 aufbewahrt.

Preface

Author (Name, Year)

Rose, 1833

References

Handbook of Mineralogy (Anthony et al.), 5 (2003), 162

CNMNC Newsletter 52, October (2019) IMA 19-F: Redefinition of coquimbite; Proposal 19-F is accepted, and coquimbite is redefined as AlFe3(SO4)6(H2O)12·6H2O (Z = 2). Neotype material is the sample studied by Fang and Robinson (1970) from the Tierra Amarilla (the original type locality described by Rose, 1833) and kept in the U.S. National Museum, Washington DC, USA, catalogue number 12548. In order to be compared with coquimbite, the chemical formulae of paracoquimbite and aluminocoquimbite are also redefined as Fe4(SO4)6(H2O)12·6H2O (Z = 6) and Al2Fe2(SO4)6(H2O)12·6H2O (Z = 2), respectively. Coquimbite and paracoquimbite are characterised by homeotypic structures, so they constitute the ‘coquimbite group’. Aluminocoquimbite, characterised by a different topology, does not belong to the coquimbite group. Daniela Mauro; Cristian Biagioni; Marco Pasero; Henrik Skogby; Federica Zaccarini: Redefinition of coquimbite, AlFe3+3(SO4)6(H2O)12⋅6H2O. Mineralogical Magazine Vol. 84, Nr. 2 (2020) S. 275-282.

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Coquimbite

AlFe3(SO4)6(H2O)12·6H2O

trigonal : 3m : P31c

7.CB.50

Aluminocoquimbite

Al2Fe2(SO4)6(H2O)12·6H2O

trigonal : 3m : P31c

7.CB.50

Paracoquimbite

Fe4(SO4)6(H2O)12·6H2O

trigonal : 3 : R3

7.CB.50

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Rhomboclase

(H5O2)+Fe3+(SO4)2·2H2O

orthorhombisch : mmm : Pnma

VI/C.08-010

Lausenite

Fe23+(SO4)3·6H2O

monoklin : 2/m : P21/m

VI/C.08-020

Kornelite

Fe23+(SO4)3·7H2O

monoklin : 2/m : P21/n

VI/C.08-030

Aluminocoquimbite

Al2Fe2(SO4)6(H2O)12·6H2O

trigonal : 3m : P31c

VI/C.08-035

Coquimbite

AlFe3(SO4)6(H2O)12·6H2O

trigonal : 3m : P31c

VI/C.08-040

Paracoquimbite

Fe4(SO4)6(H2O)12·6H2O

trigonal : 3 : R3

VI/C.08-050

Quenstedtite

Fe23+(SO4)3·10 H2O

triklin : 1 : P1

VI/C.08-060

Alunogen

Al2(SO4)3·17H2O

triklin : 1 : P1

VI/C.08-070

'Meta-alunogen'

Al4(SO4)6·27H2O

VI/C.08-080

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Kornelite

Fe23+(SO4)3·7H2O

monoklin : 2/m : P21/n

7.CC.200

Paracoquimbite

Fe4(SO4)6(H2O)12·6H2O

trigonal : 3 : R3

7.CC.210

Coquimbite

AlFe3(SO4)6(H2O)12·6H2O

trigonal : 3m : P31c

7.CC.211

Aluminocoquimbite

Al2Fe2(SO4)6(H2O)12·6H2O

trigonal : 3m : P31c

7.CC.213

Quenstedtite

Fe23+(SO4)3·10 H2O

triklin : 1 : P1

7.CC.220

Related minerals "Dana 8. Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Lausenite

Fe23+(SO4)3·6H2O

monoklin : 2/m : P21/m

29.08.01.01

Kornelite

Fe23+(SO4)3·7H2O

monoklin : 2/m : P21/n

29.08.02.01

Coquimbite

AlFe3(SO4)6(H2O)12·6H2O

trigonal : 3m : P31c

29.08.03.01

Paracoquimbite

Fe4(SO4)6(H2O)12·6H2O

trigonal : 3 : R3

29.08.04.01

Quenstedtite

Fe23+(SO4)3·10 H2O

triklin : 1 : P1

29.08.05.01

Alunogen

Al2(SO4)3·17H2O

triklin : 1 : P1

29.08.06.01

Other languages

German

Coquimbit

Spanish

Coquimbita

English

Coquimbite

French

Coquimbite

Russian

Кокимбит

Simplified Chinese

针绿矾

Alternative Name

Blakeite (of Dana)

German

Neutrales schwefelsaures Eisenoxyd

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

DeWikiPedia - search for: Coquimbit
Google-Bilder-Suche - search for: Coquimbit
Mineralogisch-Petrographisches-Institut Hamburg - search for: Coquimbit

English pages

Mindat - search for: Coquimbite
Webmineral - search for:Coquimbite
Handbook-of-Mineralogy - search for: Coquimbite
RRUFF - Raman, XRD and other mineral data - search for: Coquimbite
RRUFF - References and PDF downloads - search for: Coquimbite
American-Mineralogist-Crystal-Structure-Database - search for: Coquimbite
Athena - search for: Coquimbite

Russian pages

Webmineral.ru - search for: Кокимбит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Coquimbit
Crystal-Treasure.com - search for: Coquimbit
Bosse - search for: Coquimbit

Locations with GPS information